blob: ea60f177559c6ac18c12f1b4e9abc0699085c485 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
import datetime
from django.db import models
from django.contrib.auth.models import User
################################################################################
class Profile(models.Model):
"""Profile for a user to store roll number and other details."""
user = models.ForeignKey(User)
roll_number = models.CharField(max_length=20)
################################################################################
class Question(models.Model):
"""A question in the database."""
# An optional one-line summary of the question.
summary = models.CharField(max_length=256)
# The question text.
description = models.TextField()
# Number of points for the question.
points = models.IntegerField(default=1)
# Test cases for the question in the form of code that is run.
# This is simple Python code.
test = models.TextField()
def __unicode__(self):
return self.summary
################################################################################
class Answer(models.Model):
"""Answers submitted by users.
"""
# The question for which we are an answer.
question = models.ForeignKey(Question)
# The last answer submitted by the user.
answer = models.TextField()
# Is the answer correct.
correct = models.BooleanField(default=False)
def __unicode__(self):
return self.answer
################################################################################
class Quiz(models.Model):
"""A quiz that students will participate in. One can think of this
as the "examination" event.
"""
# The starting/ending date of the quiz.
start_date = models.DateField("Date of the quiz")
# This is always in minutes.
duration = models.IntegerField("Duration of quiz in minutes", default=20)
# Is the quiz active. The admin should deactivate the quiz once it is
# complete.
active = models.BooleanField(default=True)
# Description of quiz.
description = models.CharField(max_length=256)
def __unicode__(self):
desc = self.description or 'Quiz'
return '%s: on %s for %d minutes'%(desc, self.start_date, self.duration)
################################################################################
class QuestionPaper(models.Model):
"""A question paper for a student -- one per student typically.
"""
# The user taking this question paper.
user = models.ForeignKey(User)
# The Quiz to which this question paper is attached to.
quiz = models.ForeignKey(Quiz)
# The time when this paper was started by the user.
start_time = models.DateTimeField()
# User's IP which is logged.
user_ip = models.CharField(max_length=15)
# Unused currently.
key = models.CharField(max_length=10)
# used to allow/stop a user from retaking the question paper.
active = models.BooleanField(default = True)
# The questions (a list of ids separated by '|')
questions = models.CharField(max_length=128)
# The questions successfully answered (a list of ids separated by '|')
questions_answered = models.CharField(max_length=128)
# All the submitted answers.
answers = models.ManyToManyField(Answer)
def current_question(self):
"""Returns the current active question to display."""
qs = self.questions.split('|')
if len(qs) > 0:
return qs[0]
else:
return ''
def questions_left(self):
"""Returns the number of questions left."""
qs = self.questions
if len(qs) == 0:
return 0
else:
return qs.count('|') + 1
def answered_question(self, question_id):
"""Removes the question from the list of questions and returns
the next."""
qa = self.questions_answered
if len(qa) > 0:
self.questions_answered = '|'.join([qa, str(question_id)])
else:
self.questions_answered = str(question_id)
qs = self.questions.split('|')
qs.remove(unicode(question_id))
self.questions = '|'.join(qs)
self.save()
if len(qs) == 0:
return ''
else:
return qs[0]
def skip(self):
"""Skip the current question and return the next available question."""
qs = self.questions.split('|')
if len(qs) == 0:
return ''
else:
# Put head at the end.
head = qs.pop(0)
qs.append(head)
self.questions = '|'.join(qs)
self.save()
return qs[0]
def time_left(self):
"""Return the time remaining for the user in seconds."""
dt = datetime.datetime.now() - self.start_time
secs = dt.total_seconds()
total = self.quiz.duration*60.0
remain = max(total - secs, 0)
return int(remain)
def __unicode__(self):
u = self.user
return u'Question paper for {0} {1}'.format(u.first_name, u.last_name)
|
